IIT JEE Practice Question and Answer

Q: What is the interest rate per annum, if a sum of money invested at compound interest amount to Rs. 2400 in 3 years and in 4 years to Rs. 2,520? 1843 0

  • 1
    3.5%
    Correct
    Wrong
  • 2
    4%
    Correct
    Wrong
  • 3
    5%
    Correct
    Wrong
  • 4
    6.5%
    Correct
    Wrong
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Answer : 3. "5%"
Explanation :

Answer: C) 5% Explanation: Let 'R%' be the rate of interest From the given data, 25202400 = 1 + R10041 + R1003⇒1 + R100 = 6360⇒R = 5   Hence, the rate of interest R = 5% per annum.

Q: Chola Empire was divided into ____ 1843 0

  • 1
    Mandalams, Nadu, Avanti & Kurram
    Correct
    Wrong
  • 2
    Mandalams, Nadu, Malkhand & Kurram
    Correct
    Wrong
  • 3
    Avanti, Nadu, Malkhand & Kurram
    Correct
    Wrong
  • 4
    Mandalams, Nadu,Kurram & Valanadu
    Correct
    Wrong
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Answer : 4. "Mandalams, Nadu,Kurram & Valanadu"
Explanation :

Answer: D) Mandalams, Nadu,Kurram & Valanadu Explanation:

Q: There is a clock which shows false timing ie it shows 20 minutes less for each 1 hour. If the clock shows 12 noon now how many minutes will be lost when it shows 2 pm ? 1841 0

  • 1
    36 minutes
    Correct
    Wrong
  • 2
    48 minutes
    Correct
    Wrong
  • 3
    35 minutes
    Correct
    Wrong
  • 4
    60 minutes
    Correct
    Wrong
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Answer : 4. "60 minutes"
Explanation :

Answer: D) 60 minutes Explanation: For 1 hour, 20 minutes is slower, then for 06 miuntes - 2 minutes is slower30 minutes - 10 minutesActual time | false time 12 12 01 PM 12:40 PM (20 minutes slower) 02 PM 01:20 PM 03 PM 02:00 PM So, when actual time is 3pm, the false time is 2 pm.So, it loses 60 minutes when it shows 2 pm.

Q: Arjuna award is given for 1840 0

  • 1
    Excellence in sports
    Correct
    Wrong
  • 2
    Excellent service during emergency
    Correct
    Wrong
  • 3
    Bravery in the battle field
    Correct
    Wrong
  • 4
    Excellence in archery
    Correct
    Wrong
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Answer : 1. "Excellence in sports"
Explanation :

Answer: A) Excellence in sports Explanation: The Arjuna Awards are given by the Ministry of Youth Affairs and Sports, Government of India to recognize outstanding achievement in sports. Started in 1961, the award carries a cash prize of ₹ 500,000, a bronze statue of Arjuna and a scroll.

Q: What is the difference in the shares of profit between P and Q in a joint business at the end of one year ? a. P Invested Rs. 80,000 and withdrew Rs. 20,000 after 6 months. b. Q joined four months after the start of business. c. Q's amount was 80% of P's amount during the last six months. 1840 0

  • 1
    Only a
    Correct
    Wrong
  • 2
    Only c
    Correct
    Wrong
  • 3
    Both a & b
    Correct
    Wrong
  • 4
    Data is not sufficient
    Correct
    Wrong
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Answer : 4. "Data is not sufficient"
Explanation :

Answer: D) Data is not sufficient Explanation: a. P's investment = (80000 x 6 + 60000 x 6) = 840000 for 1 month. b & c. Q's investment = 80% of Rs. 60000 for 8 months. = Rs.(48000 x 8) for 1 month = 384000 for 1 month P : Q = 840000 : 384000 = 35 : 16. But, the total profit is not given, so data is inadequate.

Q: 10 25 45 54 60 75 85 Find the Odd Number? 1840 0

  • 1
    54
    Correct
    Wrong
  • 2
    10
    Correct
    Wrong
  • 3
    45
    Correct
    Wrong
  • 4
    85
    Correct
    Wrong
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Answer : 1. "54"
Explanation :

Answer: A) 54 Explanation: In given Series, all the numbers except 54 are multiples of 5.

Q: If the HCF of 210 and 55 is expressible in the form of 210 x 5 + 55P, then value of P = ? 1840 0

  • 1
    -23
    Correct
    Wrong
  • 2
    27
    Correct
    Wrong
  • 3
    16
    Correct
    Wrong
  • 4
    -19
    Correct
    Wrong
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Answer : 4. "-19"
Explanation :

Answer: D) -19 Explanation: HCF of 210 and 55 is 5 Now, 210x5 + 55P = 5 => 1050 + 55P = 5 => 55P = -1045 => P = -1045/55 => P = -19.

Q: Is C2 Paramagnetic or Diamagnetic? 1839 0

  • 1
    Paramagnetic
    Correct
    Wrong
  • 2
    Diamagnetic
    Correct
    Wrong
  • 3
    Ferromagnetic
    Correct
    Wrong
  • 4
    Can't be determined
    Correct
    Wrong
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Answer : 2. "Diamagnetic"
Explanation :

Answer: B) Diamagnetic Explanation: Paramagnetic Molecules :: If the Electronic configuration of a molecule has any unpaired electrons, then that molecule is said to be Paramagnetic. Diamagnetic Molecules :: If the Electronic configuration of a molecule has only paired or spin paired electrons, then that molecule is said to be Diamagnetic.   Here the molecule C2 has all paired electrons in its electronic configuration. So C2 is Diamagnetic. Whereas, B2 molecule has unpaired electrons. So B2 is Paramegnetic.

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